Flora of North America species comparison

1, erect, branched dichotomously, divaricate (drying brittle).

mostly cauline; opposite; obscurely petiolate;

blades 1(–2)-pedately or -pinnately lobed (lobes filiform), ultimate margins entire, faces glabrous.

cylindric to obconic, 1.5–3 mm diam. (larger in fruit).

slightly convex, paleate;

paleae linear to subulate, scarious.

3–6, pistillate, fertile;

corollas yellow.

3–4+, functionally staminate;

corollas yellow, tubes shorter than throats, lobes 5, triangular.

persistent, 3–6 in 1(–2) series, lance-ovate to lanceolate, scarious, brown-nerved.

of (0–)1–3+ erect, linear to subulate, herbaceous bractlets.

radiate, borne singly or (2–4) in cymiform arrays.

obcompressed, oblong to linear, ± ribbed, smooth or tuberculate, glabrous or densely papillate;

pappi persistent, of 2 spreading to recurved, smooth or proximally papillate awns.

= 10.